Siliconera's Spencer Yip put together the handy-dandy spreadsheet you see above featuring the most popular Wii Virtual Console games, available for review now following the recent Wii update. The list shows Japan on the left and the US on the right. Nobody seems to know how the popularity of these games is determined, after Siliconera made their list, it changed for Wii Fanboy, then again when we checked. Hopefully the system will become clearer in time.
Look at all that Mario in the Top 10, with a heavy dose of Link for the US. This will certainly be an interesting chart to watch as more games become available. Maybe it will finally spur Xbox Live Arcade to get one. It would be interesting to know what's popular on XBLA, at least we know it wouldn't be Mario all the way down.